Pension Plans, Postretirement and Other Employee Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	2	3	3	5
Expected return on plan assets	0	0	0	0
Net amortization:
Actuarial loss	0	0	1	1
Prior service cost (credit)	(3)	(2)	(5)	(4)
Net pension and postretirement costs (credits)	(1)	1	(1)	2
U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1	1
Interest cost	7	10	15	20
Expected return on plan assets	(16)	(16)	(32)	(32)
Net amortization:
Actuarial loss	3	1	6	3
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs (credits)	(5)	(4)	(10)	(8)
Non-U.S. | Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	6	13	12
Interest cost	5	5	9	9
Expected return on plan assets	(4)	(4)	(8)	(8)
Net amortization:
Actuarial loss	3	2	5	4
Prior service cost (credit)	0	0	0	0
Net pension and postretirement costs (credits)	$ 10	$ 9	$ 19	$ 17